The daily-slice allocation is one of the things that makes nouz different from a typical bookkeeping tool. Most accounting software shows you fixed costs only when they're paid — rent hits the books on the 1st of the month, salaries on payday. nouz spreads them across every day they apply, so your daily EBIT reflects an honest share of overhead rather than swinging wildly based on when bills landed.
01 Why allocate fixed costs daily instead of monthly?
Because subtracting rent only on the first of the month would make EBIT look great for 30 days and catastrophic for one — useless for daily decision-making. Slicing the rent across every day means each day's EBIT reflects its honest share of the fixed-cost overhead, so the daily number stays meaningful day-to-day. The same logic applies to weekly, yearly and daily costs: all get normalised to a daily slice so the daily P&L line is consistent.
The same logic applies to weekly costs (cleaner service, weekly accountant), yearly costs (annual licences, insurance), and daily costs (rare, but per-diem casual labour fits). All get normalised to a daily slice so the daily P&L line is consistent.
02 How does nouz calculate the daily slice?
nouz turns each fixed cost into a daily slice by dividing the amount by the number of days in its period. For a monthly cost it divides by 30.4375 — the average days in a month (365.25 ÷ 12); for a yearly cost it divides by 365.25. The formula, daily_slice = amount / days_per_period, lives in lib/calculations.ts, and these divisors include the average leap-day adjustment so slices sum back correctly across a year.
daily_slice = amount / days_per_period
The 30.4375 / 365.25 divisors include the average leap-day adjustment so monthly slices summed across a year equal the yearly cost, within rounding error.
03 How do the four frequencies become one daily slice?
Whichever frequency you pick, the math reduces to one daily slice that subtracts from EBIT every day the cost is active.
04 Do the daily slices sum back to the bill?
Yes, within rounding. Thirty daily slices of €92,05 from a €2.800 monthly rent sum to €2.761,50 — close enough that the rounding error is invisible — and across a full year the slices sum to exactly €2.800 × 12 = €33.600, since the divisor is exact for full-year arithmetic. In the P&L views, switching to month view shows the actual €2.800 rather than the sum-of-slices, so the reconciliation hides the rounding artifact.
In the P&L views, when you switch from day to month view, nouz shows the actual monthly cost (€2.800) rather than the sum-of-30-slices (€2.761,50). The reconciliation hides the rounding artifact at the view level.
05 Is the daily slice the same as cash leaving my account?
No — the daily slice is an allocation, not cash movement. The €92,05 slice doesn't mean €92,05 left the bank today; the actual €2.800 was paid on the first. That's the difference between accounting EBIT and cash flow: EBIT measures whether the day was economically profitable, while cash flow measures when money moved. nouz is built for the daily EBIT question — for cash flow tracking, use your bank statement or a dedicated cash-flow tool.
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